A connection terminal holding force detection device

Abstract

The application provides a connecting terminal holding force detection device for detecting the holding force of an assembled connecting terminal, the connecting terminal holding force detection device comprising a display shell, a fixing assembly and a measuring assembly. The display shell has a middle hole with a scale window. The fixing assembly comprises a first fixing member and a second fixing member arranged at both ends of the display shell. The measuring assembly is slidably arranged in the middle hole, and the measuring assembly abuts against the connecting terminal to apply an abutting force. The first fixing member is sleeved on the measuring assembly and fixes the retracted state of the measuring assembly. In the first detection, when the measuring assembly abuts against the connecting terminal and the connecting terminal does not displace, the retracted state of the measuring assembly is fixed. In the subsequent detection of the same type of connecting terminal, the measuring assembly in the retracted state applies the abutting force to the same type of connecting terminal, and the connecting terminal is not displaced, which is the qualified state. The above structure improves the detection efficiency.

Description

Technical Field

[0001] This application relates to the field of connector testing, and more particularly to a device for testing the holding force of connector terminals. Background Technology

[0002] The terminal retention force in a connector determines how tightly the terminal can be held in place after assembly into the plastic housing or sheath. During connector manufacturing and installation, the following scenarios can reduce terminal retention force: when male and female connectors are mated, the terminal head may experience impact force from the other terminal; when pulling the cable, force may be transmitted to the terminal; and during high-temperature soldering, the plastic sheath may soften or deform. All of these will reduce the terminal retention force.

[0003] Therefore, after connector assembly, the terminals need to be tested for retention force, as the terminals will shift under the insertion force. In existing technology, the testing element uses a force that pushes the terminal backward. The operator needs to manually apply this force and observe whether the testing element reaches the minimum retention force threshold, and also observe whether the terminal shifts. Currently, the terminal specifications used in mass-produced connectors are consistent, and existing testing elements require individual readings for evaluation, reducing testing efficiency.

[0004] Therefore, there is a need for a connection terminal holding force detection device that improves detection efficiency. Utility Model Content

[0005] In view of this, it is necessary to provide a connection terminal retaining force detection device that improves detection efficiency in order to solve the above problems.

[0006] Embodiments of this application provide a connection terminal holding force detection device for detecting the holding force of assembled connection terminals, including:

[0007] Display housing with a central hole featuring a graduated window;

[0008] The fixing assembly includes a first fixing member and a second fixing member disposed at both ends of the display shell;

[0009] The measuring component is slidably inserted through the central hole and abuts against the connecting terminal to apply abutment force; the first fixing member is sleeved on the measuring component and fixes the measuring component in its retracted state.

[0010] In the initial test, when the measuring component abuts against the connecting terminal and the connecting terminal does not shift, the measuring component is fixed in a retracted state. In subsequent tests of the same type of connecting terminal, the measuring component in a retracted state is used to apply abutment force to the connecting terminal of the same type. If the connecting terminal does not shift, it is considered a qualified state.

[0011] In at least one embodiment of this application, the measurement component includes:

[0012] A sliding shaft is slidably connected to the display housing and the second fixing member, and passes through the central hole;

[0013] An abutting shaft is connected to the sliding shaft and abuts against the connecting terminal; the first fixing member is sleeved on the outer surface of the abutting shaft.

[0014] The retractable member has one end abutting against the sliding shaft and the other end abutting against the second fixing member.

[0015] In at least one embodiment of this application, the first fixing member and the second fixing member are respectively locked to the display shell and seal the central hole.

[0016] In at least one embodiment of this application, the first fastener includes a first abutting surface that is in contact with the outer surface of the connecting terminal core, and the first abutting surface is used to determine that the connecting terminal retaining force detection device is in place.

[0017] In at least one embodiment of this application, the second fastener includes a second abutting surface, which abuts against the retracting member along the sliding direction.

[0018] In at least one embodiment of this application, the width of the shrinkage member is denoted as A, and the width of the second abutment surface is denoted as B, satisfying the following relationship:

[0019] A≥B.

[0020] In at least one embodiment of this application, the model of the abutment shaft matches the model of the detection connection terminal.

[0021] In at least one embodiment of this application, the display housing includes:

[0022] The first locking part has threads on its outer surface and is threadedly connected to the first fixing part.

[0023] The retractable part is connected at one end to the locking part;

[0024] The connecting part is connected at one end to the contraction part;

[0025] The second locking part is connected to the other end of the connecting part, and the inner surface of the second locking part is threaded to be threadedly connected to the second fixing member.

[0026] In at least one embodiment of this application, the sliding shaft includes:

[0027] The connecting part has a shrink-fit component fitted onto its outer surface;

[0028] The convex part is located in the middle of the connecting part and abuts against the contracting part.

[0029] In at least one embodiment of the present application, a threaded hole is provided in the connecting part and is threadedly connected to the abutting shaft.

[0030] When the holding force of the terminal is qualified in the first detection, the provided connecting terminal holding force detection device fixes the measuring component in the contracted state through the first fixation, so that the measuring component forms a physical scale representing the minimum holding force. When detecting the same type of terminal subsequently, only the measuring component in the contracted state needs to apply an abutting force to the measured terminal. If the measured terminal does not displace in the direction opposite to the abutting direction under the action of the abutting force, it is in a qualified state. The formed fixed reference can be directly used for the rapid determination of the same type of terminal, realizing efficient detection. Brief Description of the Drawings

[0031] Figure 1 is a perspective view of the connecting terminal holding force detection device described in the present application;

[0032] Figure 2 is a top view of the connecting terminal holding force detection device described in the present application;

[0033] Figure 3 is an exploded view of the connecting terminal holding force detection device described in the present application;

[0034] Figure 4 is a schematic diagram of the first installation step of the connecting terminal holding force detection device described in the present application;

[0035] Figure 5 is a schematic diagram of the second installation step of the connecting terminal holding force detection device described in the present application;

[0036] Figure 6 is Figure 2 a sectional view taken along A-A in

[0037] Description of the Main Element Symbols

[0038] 100, connecting terminal holding force detection device; 10, display case; 11, scale window; 12, middle hole; 20, fixing component; 21, first fixing piece; 22, second fixing piece; 30, measuring component; 31, sliding shaft; 32, abutting shaft; 33, contracting piece; 211, first abutting surface; 221, second abutting surface; 13, first locking part; 14, contracting part; 15, connecting part; 16, second locking part; 311, sleeved part; 312, convex part; 313, threaded hole; F1, sliding direction. Detailed Description of the Embodiment

[0039] The following will describe the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0040] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present at the same time. When a component is considered to be "provided on" another component, it can be directly provided on the other component or there may be an intermediate component present at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "rear", and similar expressions used herein are for illustrative purposes only.

[0041] An embodiment of the present application provides a connection terminal holding force detection device for detecting the holding force of an assembled connection terminal. The connection terminal holding force detection device includes a display housing, a fixing component, and a measuring component. The display housing has a middle hole with a scale window. The fixing component includes a first fixing member and a second fixing member provided at both ends of the display housing. The measuring component is slidably inserted through the middle hole. The measuring component abuts against the connection terminal to apply an abutting force. The first fixing member is sleeved on the measuring component and fixes the contracted state of the measuring component. Among them, in the first detection, when the measuring component abuts against the connection terminal and the connection terminal does not displace, the contracted state of the measuring component is fixed. When subsequently detecting connection terminals of the same model, the measuring component in the contracted state applies an abutting force to the connection terminals of the same model, and the connection terminals not displacing is the qualified state.

[0042] The above-provided connection terminal holding force detection device, when the terminal holding force is qualified in the first detection, fixes the measuring component in the contracted state through the first fixing, so that the measuring component forms a physical scale representing the minimum holding force. When subsequently detecting connection terminals of the same model, only the measuring component in the contracted state needs to apply an abutting force to the measured terminal. If the measured terminal does not displace in the direction opposite to the abutting direction under the action of the abutting force, it is the qualified state. The formed fixed reference can be directly used for the rapid determination of connection terminals of the same model, realizing efficient detection.

[0043] The following will elaborate on some embodiments of the present application in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0044] Please refer to Figures 1-6This application provides a connector holding force detection device 100 for detecting the holding force of assembled connectors. The connector holding force detection device 100 includes a display housing 10, a fixing component 20, and a measuring component 30. The display housing 10 has a central hole 12 with a scale window 11. The fixing component 20 includes a first fixing member 21 and a second fixing member 22 disposed at both ends of the display housing 10. The measuring component 30 is slidably inserted through the central hole 12. The measuring component 30 abuts against the connector to apply abutment force. The first fixing member 21 is sleeved on the measuring component 30 and fixes the measuring component 30 in a retracted state. In the initial test, when the measuring component 30 abuts against the connector and the connector does not displace, the retracted state of the measuring component 30 is fixed. In subsequent tests of the same type of connector, the retracted measuring component 30 applies abutment force to the connector of the same type, and the connector is considered qualified if it does not displace.

[0045] Specifically, it is used to detect the retaining force of the connecting terminals after connector assembly. The detection device includes a display housing 10, a fixing component 20, and a measuring component 30.

[0046] The display housing 10 is a hollow structure with a central hole 12 extending through its inner cavity along its length. The structure of the display housing 10, from front to back, includes a first locking part 13, a contraction part 14, a connecting part 311, and a second locking part 16.

[0047] The first locking part 13 of the display housing 10 is located at the front end, and the outer surface of the first locking part 13 is threaded for threaded connection with the first fixing member 21. A contraction part 14 and a connecting part 311 are located in the middle of the display housing 10. The contraction part 14 abuts against the sliding shaft 31 of the measuring component 30. The inner wall of the connecting part 311 is a smooth cylindrical wall, suitable for the sliding of the measuring component 30. A second locking part 16 is located at the rear of the display housing 10, and the inner surface of the second locking part 16 is threaded for threaded connection with the second fixing member 22.

[0048] To enable the reading function, the connecting part 311 of the display housing 10 is provided with an observation window. The observation window is elongated, and a holding force range is provided on the side of the window. The scale line on the measuring component 30 corresponds to the position of the holding force range, which is used to display the retraction state of the measuring component 30, that is, to display the minimum holding force of the connecting terminal after the connecting terminal holding force detection device 100 detects the connecting terminal.

[0049] The fixing assembly 20 includes a first fixing member 21 and a second fixing member 22 disposed at both ends of the display housing 10. The first fixing member 21 is sleeved on the measuring assembly 30 and locked to the first locking part 13 of the display housing 10 by means of threads. The first fixing member 21 has a first abutting surface 211. The function of the first abutting surface 211 is to abut against the outer surface of the plastic sheath of the connecting terminal, thereby defining the abutting position of the detection device during use and ensuring that the detection device is always in the same reference state.

[0050] The second fixing member 22 is fixed to the inner side of the second locking part 16 of the display housing 10 by a threaded connection. The second fixing member 22 has a second abutment surface 221 inside, which abuts against the shrinking member 33 in the measuring assembly 30, thereby completing the shrinking state of the shrinking member 33. After the connection terminal holding force detection device 100 is assembled, both the first fixing member 21 and the second fixing member 22 achieve a sealed fit with the display housing 10, effectively preventing external dust from entering the central hole 12 of the display housing 10 and affecting the sliding accuracy of the measuring assembly 30.

[0051] The measuring component 30 includes a sliding shaft 31, an abutment shaft 32, and a shrinking member 33. The sliding shaft 31 is a cylindrical metal part with a threaded hole 313 at its front end. The abutment shaft 32 is connected to the sliding shaft 31 through the threaded hole 313. A protrusion 312 is located in the middle of the sliding shaft 31, forming an annular step on its surface. An annular scale line is provided on the outer surface of the protrusion 312. The scale line indicates the shrinkage amount of the shrinking member 33. The sliding shaft 31 slides against the inner wall of the shrinking part 14 of the display housing 10 via its outer surface.

[0052] To ensure stable contact between the shrinking member 33 and the second contact surface 221, the width of the shrinking member 33 is denoted as A, and the width of the second contact surface 221 is denoted as B, satisfying the relationship A≥B. This relationship between the width of the second contact surface 221 and the width of the shrinking member 33 prevents uneven loading or localized jamming during compression, ensuring uniform axial force on the spring, thereby improving the measurement accuracy and long-term stability of the detection device.

[0053] The abutment shaft 32 is fixedly connected to the threaded hole 313 at the front end of the sliding shaft 31 via threads. The front end structure of the abutment shaft 32 is customized according to the type of connection terminal to be tested. For example, when testing pin-type connection terminals, the front end of the abutment shaft 32 is set as a socket structure, and the inner diameter of its socket matches the tolerance of the outer diameter of the pin of the connection terminal to ensure a complete fit without any loose connection during testing. When the terminal to be tested is a socket type, the front end of the abutment shaft 32 is set as a pin structure. For terminals that cannot be plugged in, such as bare terminals, the front end of the abutment shaft 32 can be designed as a round head, flat surface, or spherical surface to provide a stable surface contact method.

[0054] In addition, to achieve rapid adaptation, the abutment shaft 32 can be designed as a replaceable structure and connected to the sliding shaft 31 by means of threads, quick-connect or magnetic attraction. Users can choose different shaped connectors according to different detection needs, thereby improving the flexibility and versatility of the device.

[0055] A retractable member 33 is disposed on the outside of the sleeve portion 311 of the sliding shaft 31. One end of the retractable member 33 abuts against the protrusion 312 of the sliding shaft 31, and the other end abuts against the second abutment surface 221 of the second fixing member 22. When the operator applies a pushing force to move the abutment shaft 32 forward, the retractable member 33 is compressed along the sliding direction F1, and the sliding shaft 31 moves within the central hole 12, thereby causing the protrusion 312 to display different scales in different positions of the window.

[0056] To facilitate quantitative assessment of the holding force, the retraction element 33 in this embodiment uses a helical compression spring with elastic mechanical properties as the elastic element. The working characteristics of the compression spring can be analyzed based on Hooke's Law.

[0057] When the operator applies force through the abutment shaft 32, causing the sliding shaft 31 to compress the retractable member 33, the compression spring deforms and stores elastic potential energy. The abutment force (i.e., compression force) generated by the retractable member 33 at this time can be calculated using the following formula:

[0058] F = kx;

[0059] F is the resisting force generated by the contraction component, in N. k is the stiffness spring constant of the contraction component, in N / mm. x is the displacement of the contraction component under compression, in mm.

[0060] In this testing device, the contact force is equal to the holding force of the connecting terminal. This is because if the connecting terminal does not undergo relative displacement during the application of the contact force by the measuring component 30, it indicates that the applied contact force has reached or exceeded the minimum holding force threshold of the terminal. In practical applications, the stiffness spring constant and the amount of displacement of the compressed member 33 can be adjusted to enable this testing device to detect connecting terminals with different holding forces.

[0061] When using this detection device for the first detection, the operator first aligns the abutting shaft 32 with the assembled connection terminal. Then the operator pushes the measuring component 30 forward so that the front end of the abutting shaft 32 applies a thrust to abut against the connection terminal until the first abutting surface 211 closely abuts against the end face of the connector plastic shell as the positioning reference. Then when the connection terminal does not undergo an obvious backward displacement under this thrust, it indicates that the current thrust has reached or exceeded the minimum holding force of the connection terminal. At this time, the operator tightens the first fixing member 21 to form a clamping and fixing structure with the abutting shaft 32, thereby locking the sliding shaft 31 in the current compressed state. The locked position is the contracted state representing the minimum holding force.

[0062] When conducting batch detections on connection terminals of the same model subsequently, the operator can keep the first fixing member 21 in the locked state and no longer change the position of the measuring component 30. Each time during detection, the operator only needs to align the detection device with the measured connection terminal and apply the same thrust again. If the connection terminal does not undergo displacement during the abutting process, it is considered that the holding force of the connection terminal reaches or exceeds the preset standard and is qualified.

[0063] Since the contracted position of the measuring component 3 is fixed, there is no need to read the scale value again during the entire detection process. It only requires visual judgment to determine whether the connection terminal moves, thus significantly improving the detection efficiency and being applicable to the detection of a large number of standardized terminals.

[0064] The installation method of this detection device is as follows. First, screw the abutting shaft 32 and the sliding shaft 31 tightly. Then, place the fixed abutting shaft 32 and sliding shaft 31 into the middle hole 12 of the display shell 10, with part of the abutting shaft 32 extending out of the middle hole 12, and the protruding part 312 of the sliding shaft 31 abutting against the contracting part 14 of the display shell 10. Then, after sleeving the spring on the outer surface of the sliding shaft 31, thread the second fixing member 22 to one end of the display shell 10 to seal the opening at one end of the middle hole 12. At the same time, the second fixing member 22 abuts against the contracting part 14. Finally, sleeve the first fixing member 21 on the part of the abutting shaft 32 extending out of the middle hole 12 and thread-fix it to the display shell 10.

[0065] Therefore, the aforementioned terminal holding force detection device 100, when the terminal holding force is initially tested and found to be qualified, fixes the retracted measuring component 30 through a first fixing mechanism, making the measuring component 30 a physical scale representing the minimum holding force. When subsequently testing terminals of the same type, only the retracted measuring component 30 is used to apply an abutment force to the terminal being tested. If the terminal being tested does not displace in the opposite direction to the abutment force, it is considered qualified. This fixed benchmark can be directly used for rapid determination of terminals of the same type, achieving efficient testing. The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A device for detecting the holding force of a connecting terminal, used to detect the holding force of an assembled connecting terminal, characterized in that, include: Display housing with a central hole featuring a graduated window; The fixing assembly includes a first fixing member and a second fixing member disposed at both ends of the display shell; The measuring component is slidably inserted through the central hole and abuts against the connecting terminal to apply abutment force; the first fixing member is sleeved on the measuring component and fixes the measuring component in its retracted state. In the initial test, when the measuring component abuts against the connecting terminal and the connecting terminal does not shift, the measuring component is fixed in a retracted state. In subsequent tests of the same type of connecting terminal, the measuring component in a retracted state is used to apply abutment force to the connecting terminal of the same type. If the connecting terminal does not shift, it is considered a qualified state.

2. The terminal holding force detection device according to claim 1, characterized in that, The measurement component includes: A sliding shaft is slidably connected to the display housing and the second fixing member, and passes through the central hole; An abutting shaft is connected to the sliding shaft and abuts against the connecting terminal; the first fixing member is sleeved on the outer surface of the abutting shaft. The retractable member has one end abutting against the sliding shaft and the other end abutting against the second fixing member.

3. The connection terminal holding force detection device according to claim 1, characterized in that, The first fixing member and the second fixing member are respectively locked to the display shell and seal the central hole.

4. The terminal holding force detection device according to claim 1, characterized in that, The first fastener includes a first abutting surface, which is in contact with the outer surface of the connecting terminal. The first abutting surface is used to determine that the connecting terminal retaining force detection device is in place.

5. The terminal holding force detection device according to claim 2, characterized in that, The second fixing member includes a second abutting surface, which abuts against the retracting member along the sliding direction.

6. The terminal holding force detection device according to claim 5, characterized in that, The width of the shrink-fit component is denoted as A, and the width of the second abutment surface is denoted as B, satisfying the following relationship: A≥B.

7. The terminal holding force detection device according to claim 2, characterized in that, The model of the abutment shaft matches the model of the detection connection terminal.

8. The terminal holding force detection device according to claim 2, characterized in that, The display housing includes: The first locking part has threads on its outer surface and is threadedly connected to the first fixing part. The retractable part is connected at one end to the locking part; The connecting part is connected at one end to the contraction part; The second locking part is connected to the other end of the connecting part, and the inner surface of the second locking part is threaded to be threadedly connected to the second fixing member.

9. A terminal holding force detection device according to claim 8, characterized in that, The sliding shaft includes: The outer surface of the sleeve part is fitted with a shrink-fit element; The protrusion is located in the middle of the connecting part and abuts against the contraction part.

10. A terminal holding force detection device according to claim 9, characterized in that... The connecting part has a threaded hole and is threadedly connected to the abutting shaft.

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